package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;


@Service
public class FileServiceImpl implements FileService {


    @Autowired
    private MinioClient minioClient;

    @Autowired
    private MinioProperties minioProperties;

    /**
     * 步骤1: 判断桶是否存在
     * 步骤2: 不存在,创建桶以及设置访问权限
     * 步骤3: 向桶中传递文件
     * 步骤4: 拼接返回的url地址
     */
    @Override
    public String uploadFile(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

        //步骤1: 判断桶是否存在
        boolean bucketExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build());
        //步骤2: 不存在,创建桶以及设置访问权限
        if (!bucketExists) {
            //创建桶
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
            //设置权限
            //设置hello-minio桶的访问权限
            String policy = """
                        {
                          "Statement" : [ {
                            "Action" : "s3:GetObject",
                            "Effect" : "Allow",
                            "Principal" : "*",
                            "Resource" : "arn:aws:s3:::%s/*"
                          } ],
                          "Version" : "2012-10-17"
                        }""".formatted(minioProperties.getBucketName());
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder().
                    bucket(minioProperties.getBucketName())
                    .config(policy).build());
        }

        //步骤3: 向桶中传递文件

        //todo: 文件重名的问题  uuid + file.getOriginalFilename()
        //todo: 文件直接放在桶中太乱的问题
        // 20241210/uuid_对象名.png
        String objectName = new SimpleDateFormat("yyyyMMdd").format(new Date()) + "/" + UUID.randomUUID().toString().replaceAll("-","") + "_" + file.getOriginalFilename();

        //minioClient.uploadObject() 传递本地存在的文件 c d f ...  filename = 文件的地址
        //minioClient.putObject() 传递内存中存在文件数据 流 | 字节数组
        minioClient.putObject(PutObjectArgs.builder()
                .bucket(minioProperties.getBucketName())
                .object(objectName)
                .stream(file.getInputStream(),file.getSize(),-1)  //-1 不切割原有文件大小
                .contentType(file.getContentType())
                .build());

        return String.join("/",minioProperties.getEndpoint(),minioProperties.getBucketName(),objectName);
    }
}
